Concrete-mixing device



l Aug. 26 1924.

LSSS H. M.. SMWH cancun! MIXING DEvIcE Filed swt- 11. 1922 2 sheets-smet 1 miih INVENTOR Fig. 2.

WITNESS:

Aug. 26, 1924. 1,506,680 i H. M. SMITH CONCRETE MIXING DEVGE Filed Sept. 11 1922 2 Sheets-Sheet 2 HarryMSmith NVENTOR WITNESS:

Patented Aug. 261, 1924.

UNITED STATES HARRY M. SMITH, OF MARCUS HOOK, IEEN1'.\TSYLVA].\TIAY CONCRETE-MIXING DEVICE.

Application filed September 11, 1922. Serial No. 587,477.

T0 all whom t may cof/mera:

Be it known that l, HARRY M. SMiTH, a citizen of the United States, residing at Marcus Hook, in the county of Delaware and State of Pennsylvania, have invented new and useful Improvements in ConcretelMixing Devices, of which the following is a specification.

This invention relates to devices for mixing concrete for poured concrete work, and is particularly directed to `a device for mixing the concrete while it is being elevated to curing position.

he p-rincipal object of the invention is to produce a device of this nature which shall be simple of construction, cheap to manufacture, and highly eflicient for the purpose for which it is designed.

Another object is to produce a device of this nature which shall operate to so thoroughly mix the concrete during its being hoisted, that it wtill not be permitted 'to settle, the mixing device also operating to assist in the ejecting of the mixture from the container when the concrete is being` poured.

Another object is to produce a device of this nature which shall be independent of -the hoisting action in effecting the mixing.

Another object is to produce a device of this nature in which the mixing elements may be continuously operated duringl the hoisting and dumping of the mixture.

With these and other objects in view, which will be more clearly noted as the specification proceeds, the invention resides in certain novel features of construction and combination and arrangement of parts, the essential elements of which are hereinafter fully described, are particularly pointed out in the appended claims, and are illustrated in the accompanying drawing in which:

vFigure 1 is a top plan view of my improved concrete mixing device.

Figure 2 is a front elevation of the same.

Figure 3 is a side elevation of the same.

Figure 4 is a vertical sectional view on line 4 4 of Figure 1.

Like characters of reference refer to like parts in all views.

A general framework or scaffolding (not shown in full) is constructed where a structure is to be poured, as is well understood in the art. This framework includes a pair of vertically disposed rails 11 constituting the track on which the hoist is raised.

The hoist or elevator itself comprises a framework i2, provided at t-he sides with U-shaped guides or runners 14 which embrace the face and sides of the rails 1l, and provided at the top with a ring or hook 15 or any other suitable and well-known means for attaching the hoisting cable. At one side, the frame l2 is provided with an additional brace 16 which aids the frame in supporting a floor member 17 upon which a motor 18 is mounted, said motor being connected in any suitable manner with an adequate source of electrical supply. The motor is provided with a driving sprocket wheel 19.

Mounted in bearings in the frame 12 is a shaft 20 upon which are mounted two sprocket wheels 21 and 22, the sprocket 21 being connected by a chain 23 with sprockets 23 so to be driven therefrom. The sprocket 22 is connected up for driving the mixing elements which will now be described.

Mounted on bearings 24 so as to permit it to tilt er oscillate about said shaft, is the bucket mechanism. This comprises primarily a bucket element or container 25, the upper end of which is secured in suitable manner such as by wedging in the opening 26 in the platform and by means of the flange 26"JL in a platform or metal. frame 26. Secured to the frame 26 by bolts 27 transversely of the bucket is a bridge 27 having a pair of upwardly extending bearing pieces 28. Mounted in the bearings 28 is a shaft 29, the outer end of which is provided with a sprocket 30 adapted to be driven by a chain 31 passing over the said sprocket- 80 and over the aforementioned sprocket 22. On the other end of the shaft 29 is a bevel gear 32, the teeth of which mesh with the teeth of a bevel gear 33 securely fastened to the upper end of a shaft 34 having its bearings in the bridge 27 and in a downwardly projecting lug 35 formed on the bottom of the bucket 25.

The shaft 34 is provided near its lower end with a block 36 from which there radiates a plurality of stirring blades 37. Thel blades 37 are set obliquely as shown in Figough mixing of the contents. The lower edges of the blades-37 preferably scrape the bottom of the bucket 25 so that when the bucket is dumped if the blades are kept revolving they will scrape off and eject all of the contents of the bucket.

The entire bucket mechanism is normally tilted a trifle backwardly with stops 39 on the frame 26 in engagement with the frame 12. This holds the bucket in substantially upright position during the hoisting of the same, and when the device reaches the top of the tower or other position Where the same is to be poured, the following mechanism is provided for the purpose of automatically dumping the bucket.

Mounted on a suitable framework or scaffolding (not shown) are upper and lower cam members or tilting tracks which may be provided only at one side of the bucket, or as is usually preferable, at both sides. The frame 26 is bent down at its front edge into a pair of ears 42 which support transverse shafts 43, 44, theformer being arranged above the latten Shaft 43 is provided at its ends with rollers 45 and shaft 44 is similarly provided with rollers 46. VAs will be readily seen from the drawing the bucket when raised to the desired position brings the roller 45 into contact with the upper cam 4() which forces the bucket mechanism about the shaft 20 until the rollers 46 engage the upper face of the lower cam 41, at which time the bucket will have passed beyond its center of gravity and the weight of the top will rest against the said cam 41.

As the frame 12 ascends the rollers 46 extends outwardly on cam 41 and the contents of the bucket are automatically dumped out. The fact that the bucket mechanism tilts or oscillates about the shaft 20 which lis the main drive-shaft, makes the position to keep the stirring device rotating during the dumping action and after the bucket has been stopped, so that the entire contents of the bucket maybe discharged through the outlet 25 which is normally closed bythe closure 26.

While I have described what I deem to be the most desirable embodiment of my invention, I do not limit myself to the specific details of construction or material, ncrto anything less than what is defined in the allowed claims. Y

1. A concrete mixing machine comprising a movable frame-work, a drive-shaft rotatably mounted therein, a concrete mixing and pouring mechanism supported from said drive-shaft, and til-table upon the drive-sliaft as an axis, said mechanism extending right angles tosaid drive-shaft and being provided with an out-let opening at the end adjacent to the drive-shaft, and a motor mounted in said frame-work and operatively connected to said drive-shaft and movable in unison with said frame-work.

2. A concrete mixing machine comprising a movable frame-work, a drive-shaft rotatably mounted therein, a concrete mixing Vand pouring mechanism supported from said drive-shaft, and tiltable upon the driveshaft as an axis, said mechanismV extending at right angles to said drive-shaft and being provided with an outlet opening at the end adjacent to the drive-shaft, and' va motor mounted in said frame-work and operatively connected to said drive-shaft and movable in unison with said framework, and means for supporting the normal upper end of'said mixing and pouring mechanism during the tilting movement thereof.

3. A concrete mixing machine comprising a movable framework, a drive-shaft rotatably mounted therein, a concrete mixing and pouring mechanism supported from said drive-shaft, and tiltable upon the drive-shaft as an axis, said mechanism extending at right angles to said drive-shaft and being provided with an outlet opening at the end adjacent to the drive-shaft, and, a motor mounted in said framework and o erativel'y connected to said drive-shaft an movable in unison with said framework, a framework extension on said mixing and pouring mechanism, a plurality Yof rollers supported by said extension, and means co-operating wit said rollers for supporting the normal upper end of the mixing and pouring mechanism during the pouring ofmaterial therefrom.

4. A concrete mixing and hoisting device comprising a vertical moving frame, la driveshaft rotatably carried thereby, a concrete mixing and pouring mechanism tiltably mounted on said shaft for tilting movement about the shaft as an axis, saidrmechanism comprising a container, a stirring `device mounted in said container, means connecting the stirring device and drive-shaft for rotating the stirring device about an axis transversely of the axis of the drive-shaft, said container provided with an outlet opening adjacent to said drive-shaft, and means associated with' the normal upper end ofV said container for supporting the upper end of the container during tilting pouring movement thereof. A

A concrete,v mixing and hoisting device comprising a vertical moving frame, adriveshaft rotatably carried thereby, a concrete mixing and pouring mechanism tiltably mounted on said shaft forV tilting movement about the shaft as an axis, said mechanism comprising a'container, a stirring device mounted in said container, means connectingy the stirring device and drive-shaft for rotating the stirring device about an movement thereof, a motor mounted in said axis transversely of the axis of the driveframework and movable in unison with the shaft, said container provided with an outframework and connected to said driving l0 let opening adj aeent to said drive-shaft, and shaft.

means associated with the normal upper end In testimony whereof l affix my signaof said container for supporting the upper` ture.

end of the container during tilting pouring HARRY M. SMITH. 

